// AuthenticationManager.ChallengeHandler function that prompts the user for login information to create a credential
private async Task <Credential> CreateCredentialAsync(CredentialRequestInfo info)
{
// See if authentication is already in process
if (_loginTaskCompletionSrc != null)
{
return(null);
}
// Create a new TaskCompletionSource for the login operation
// (passing the CredentialRequestInfo object to the constructor will make it available from its AsyncState property)
_loginTaskCompletionSrc = new TaskCompletionSource <Credential>(info);
// Create a dialog (fragment) with login controls
LoginDialogFragment enterLoginDialog = new LoginDialogFragment();
// Handle the login and the cancel events
enterLoginDialog.OnLoginClicked += LoginClicked;
enterLoginDialog.OnLoginCanceled += (s, e) =>
{
_loginTaskCompletionSrc.TrySetCanceled();
_loginTaskCompletionSrc = null;
};
// Begin a transaction to show a UI fragment (the login dialog)
FragmentTransaction transax = FragmentManager.BeginTransaction();
enterLoginDialog.Show(transax, "login");
// Return the login task, the result will be ready when completed (user provides login info and clicks the "Login" button)
return(await _loginTaskCompletionSrc.Task);
}
// AuthenticationManager.ChallengeHandler function that prompts the user for login information to create a credential
private async Task<Credential> CreateCredentialAsync(CredentialRequestInfo info)
{
// See if authentication is already in process
if (_loginTaskCompletionSrc != null) { return null; }
// Create a new TaskCompletionSource for the login operation
// (passing the CredentialRequestInfo object to the constructor will make it available from its AsyncState property)
_loginTaskCompletionSrc = new TaskCompletionSource<Credential>(info);
// Create a dialog (fragment) with login controls
LoginDialogFragment enterLoginDialog = new LoginDialogFragment();
// Handle the login and the cancel events
enterLoginDialog.OnLoginClicked += LoginClicked;
enterLoginDialog.OnLoginCanceled += (s, e) =>
{
_loginTaskCompletionSrc.TrySetCanceled();
_loginTaskCompletionSrc = null;
};
// Begin a transaction to show a UI fragment (the login dialog)
FragmentTransaction transax = FragmentManager.BeginTransaction();
enterLoginDialog.Show(transax, "login");
// Return the login task, the result will be ready when completed (user provides login info and clicks the "Login" button)
return await _loginTaskCompletionSrc.Task;
}